Building lipo Pack Question

[wesnewell]

you can buy chargers anywhere you want, ebay, aliexpress, dhgate, bmsbattery, etc., etc. Here's one place.
https://bmsbattery.com/16-alloy-shell-charger
You've got an 888wh pack, so if you want to charge it in 1 hour, you need a 900W charger. A 300W charger will take ~3 hours. Divide 888 by the number of hours you want to charge to find the wattage you need to charge in that time. If you're running a 12s4p pack, then you only need 2 battery medics to safely charge the pack.

 

[Simonvtr]

you can buy chargers anywhere you want, ebay, aliexpress, dhgate, bmsbattery, etc., etc. Here's one place.
https://bmsbattery.com/16-alloy-shell-charger
You've got an 888wh pack, so if you want to charge it in 1 hour, you need a 900W charger. A 300W charger will take ~3 hours. Divide 888 by the number of hours you want to charge to find the wattage you need to charge in that time. If you're running a 12s4p pack, then you only need 2 battery medics to safely charge the pack.

I guess my idea of a charger is back during my rc hobby days.
How do the charger you link work?
Just plug them in and use my medic to beep when its topped off then unplug?
Or are those charger smart enough to stop when battery is full?
They look like power supply to me.
How are they different then a icharger?

Thank you for taking your time to explain this to me.
I just don't want to make anymore wrong purchase.

 

[izeman]

as i wrote: those are mainly power supplies. of course they stop when the battery is full. there's nothing else they can do. if the battery reaches the charger's voltage there is no current flow anymore. BUT! there is no single cell monitoring like an icharger or bms does. so YOU have to watch/listen the battery medics. if one cell is 1V too low and another is 1V too high you still get the same total voltage - but only for a short time as the pack will go off in flames.

 

[wesnewell]

This is the battery medics I'm referring to. Hook one or more of these to each 6s pack or paralleled group of packs and set max voltage to 4.2V to keep from over charging individual cells. They don't beep as afaik, but maybe my hearings bad. I think all you have is battery monitors that beep when the voltage gets low.
http://www.ebay.com/itm/3-in-1-LCD-Discharger-Balancer-Meter-Tester-for-2-6S-lipo-Li-Fe-battery-HG-/271723522137
https://www.youtube.com/watch?v=SDjgrVDnyrs
https://www.youtube.com/watch?v=J_oKpOSzJpo

 

[Simonvtr]

Is it safe to run 6s lipo's and 5s lipo's in series to get the desired voltage I need?
Currently I have two 6s in series giving me 49 volts.
I need another 40 volts to get the speed I want out of my 6t mxus.
Can I run three 6s and 1 5s in series? if everything else like battery discharge rating and ah stay the same?

 

[Ykick]

Is it safe to run 6s lipo's and 5s lipo's in series to get the desired voltage I need?
Currently I have two 6s in series giving me 49 volts.
I need another 40 volts to get the speed I want out of my 6t mxus.
Can I run three 6s and 1 5s in series? if everything else like battery discharge rating and ah stay the same?

No problem to series string any number of cells.

 

[izeman]

A 6s is nothing else than 6 single cells in series. So you can add as many cells as you want. Just take care to use similar cells. So if the 6s is 5000mAH 20c then the 5s should be 5000mAh or more and 20c+ to not be the limiting factor of the big pack.

 

[Simonvtr]

Thanks for all the help. So close to finishing my build just need a 90v bulk charger which I am going to get after the winter season.

Couldn't have done it without the ES members help.
Again thank you.

 

[izeman]

no worries. it's a take and give back thing. i guess 90% of the builds would not work properly w/o the help here
but before you thank us we have to get you back on the road again *fingers crossed*